Race Condition Affecting linux-4.19 package, versions <4.19.232-1~deb9u1


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.41% (35th percentile)

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  • Snyk IDSNYK-DEBIAN9-LINUX419-1312512
  • published28 Nov 2020
  • disclosed28 Nov 2020

Introduced: 28 Nov 2020

CVE-2020-29374  (opens in a new tab)
CWE-362  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Debian:9 linux-4.19 to version 4.19.232-1~deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-4.19 package and not the linux-4.19 package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.

CVSS Base Scores

version 3.1